package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;


    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        // 对明文密码进行md5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();

        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);

        //设置账号状态，默认1正常状态，0锁定状态
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码，使用md5加密，默认是123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置当前创建人的id和修改人的id
        // TODO 后期需要从当前登录用户中获取
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());

        //插入数据
        employeeMapper.insert(employee);

    }

    /*
         * 员工分页查询
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {

        //分页查询，这个分页插件默认是查询10条
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        //getTotal()获取总记录数，getResult()获取分页后的数据
        return new PageResult(page.getTotal(), page.getResult());
    }

    /*
      * 启用禁用员工账号
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .build();
        employeeMapper.update(employee);
    }

    /*
     *  根据id查询员工信息
     */

    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;
    }

    /*
      *  员工信息修改
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {

        //对象属性拷贝
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        //设置当前登录用户的id
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }


}
